14 * Check if the file exists and it's large enough.
16 static int file_ok(struct thread_data *td, struct fio_file *f)
20 if (f->filetype != FIO_TYPE_FILE ||
21 (td->io_ops->flags & FIO_DISKLESSIO))
24 if (lstat(f->file_name, &st) == -1)
28 * if it's a special file, size is always ok for now
30 if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))
32 if (st.st_size < (off_t) f->file_size)
38 static int create_file(struct thread_data *td, struct fio_file *f)
40 unsigned long long left;
45 f->fd = open(f->file_name, O_WRONLY | O_CREAT | O_TRUNC, 0644);
47 td_verror(td, errno, "open");
51 if (ftruncate(f->fd, f->file_size) == -1) {
52 td_verror(td, errno, "ftruncate");
56 if (posix_fallocate(f->fd, 0, f->file_size) < 0) {
57 td_verror(td, errno, "posix_fallocate");
61 b = malloc(td->max_bs[DDIR_WRITE]);
62 memset(b, 0, td->max_bs[DDIR_WRITE]);
65 while (left && !td->terminate) {
66 bs = td->max_bs[DDIR_WRITE];
70 r = write(f->fd, b, bs);
77 td_verror(td, errno, "write");
79 td_verror(td, EIO, "write");
87 else if (td->create_fsync)
100 static unsigned long long set_rand_file_size(struct thread_data *td,
101 unsigned long long total_size)
103 unsigned long long upper = total_size;
104 unsigned long long ret;
107 if (upper > td->file_size_high)
108 upper = td->file_size_high;
109 else if (upper < td->file_size_low)
114 r = os_random_long(&td->file_size_state);
115 ret = td->file_size_low + (unsigned long long) ((double) upper * (r / (RAND_MAX + 1.0)));
116 ret -= (ret % td->rw_min_bs);
122 static int create_files(struct thread_data *td)
125 int err, need_create, can_extend;
126 unsigned long long total_file_size, local_file_size;
127 unsigned int i, new_files;
130 total_file_size = td->total_file_size;
131 for_each_file(td, f, i) {
132 unsigned long long s;
134 f->file_offset = td->start_offset;
136 if (f->filetype != FIO_TYPE_FILE)
139 if (f->flags & FIO_FILE_EXISTS) {
141 if (s > total_file_size)
144 total_file_size -= s;
150 * unless specifically asked for overwrite, let normal io extend it
152 can_extend = !td->overwrite && !(td->io_ops->flags & FIO_NOEXTEND);
156 local_file_size = total_file_size;
157 if (!local_file_size)
158 local_file_size = -1;
162 for_each_file(td, f, i) {
165 if (f->filetype != FIO_TYPE_FILE)
167 if (f->flags & FIO_FILE_EXISTS) {
168 total_file_size += f->file_size;
172 if (!td->file_size_low)
173 f->file_size = total_file_size / new_files;
176 * If we don't have enough space left for a file
177 * of the minimum size, bail.
179 if (local_file_size < td->file_size_low) {
180 log_info("fio: limited to %d files\n", i);
181 new_files -= (td->nr_files - i);
186 f->file_size = set_rand_file_size(td, local_file_size);
187 local_file_size -= f->file_size;
190 total_file_size += f->file_size;
191 file_there = !file_ok(td, f);
193 if (file_there && td_write(td) && !td->overwrite) {
194 unlink(f->file_name);
198 need_create += !file_there;
204 if (!td->total_file_size) {
205 log_err("Need size for create\n");
206 td_verror(td, EINVAL, "file_size");
211 log_info("%s: Laying out IO file(s) (%u files / %LuMiB)\n",
212 td->name, new_files, total_file_size >> 20);
215 for_each_file(td, f, i) {
217 * Only unlink files that we created.
219 f->flags &= ~FIO_FILE_UNLINK;
220 if (file_ok(td, f)) {
222 f->flags |= FIO_FILE_UNLINK;
224 err = create_file(td, f);
234 static int file_size(struct thread_data *td, struct fio_file *f)
239 if (fstat(f->fd, &st) == -1) {
240 td_verror(td, errno, "fstat");
244 f->real_file_size = st.st_size;
246 if (!f->file_size || f->file_size > f->real_file_size)
247 f->file_size = f->real_file_size;
249 f->real_file_size = f->file_size;
254 static int bdev_size(struct thread_data *td, struct fio_file *f)
256 unsigned long long bytes;
259 r = blockdev_size(f->fd, &bytes);
261 td_verror(td, r, "blockdev_size");
265 f->real_file_size = bytes;
268 * no extend possibilities, so limit size to device size if too large
270 if (!f->file_size || f->file_size > f->real_file_size)
271 f->file_size = f->real_file_size;
273 f->file_size -= f->file_offset;
277 static int get_file_size(struct thread_data *td, struct fio_file *f)
281 if (f->filetype == FIO_TYPE_FILE) {
282 if (!(f->flags & FIO_FILE_EXISTS))
283 ret = file_size(td, f);
284 } else if (f->filetype == FIO_TYPE_BD)
285 ret = bdev_size(td, f);
287 f->real_file_size = -1;
292 if (f->file_offset > f->real_file_size) {
293 log_err("%s: offset extends end (%Lu > %Lu)\n", td->name, f->file_offset, f->real_file_size);
300 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
308 * FIXME: add blockdev flushing too
311 ret = madvise(f->mmap, f->file_size, MADV_DONTNEED);
312 else if (f->filetype == FIO_TYPE_FILE) {
313 ret = fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_DONTNEED);
314 } else if (f->filetype == FIO_TYPE_BD) {
315 ret = blockdev_invalidate_cache(f->fd);
316 } else if (f->filetype == FIO_TYPE_CHAR)
320 td_verror(td, errno, "invalidate_cache");
327 void generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
333 int generic_open_file(struct thread_data *td, struct fio_file *f)
338 flags |= OS_O_DIRECT;
342 if (td_write(td) || td_rw(td)) {
345 if (f->filetype == FIO_TYPE_FILE)
348 f->fd = open(f->file_name, flags, 0600);
350 if (f->filetype == FIO_TYPE_CHAR)
355 f->fd = open(f->file_name, flags);
361 td_verror(td, __e, "open");
362 if (__e == EINVAL && td->odirect)
363 log_err("fio: destination does not support O_DIRECT\n");
365 log_err("fio: try reducing/setting openfiles (failed at %u of %u)\n", td->nr_open_files, td->nr_files);
369 if (get_file_size(td, f))
372 if (td->invalidate_cache && file_invalidate_cache(td, f))
375 if (!td_random(td)) {
376 if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_SEQUENTIAL) < 0) {
377 td_verror(td, errno, "fadvise");
381 if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_RANDOM) < 0) {
382 td_verror(td, errno, "fadvise");
393 int open_files(struct thread_data *td)
399 for_each_file(td, f, i) {
400 err = td_io_open_file(td, f);
404 if (td->open_files == td->nr_open_files)
411 for_each_file(td, f, i)
412 td_io_close_file(td, f);
417 int setup_files(struct thread_data *td)
424 * if ioengine defines a setup() method, it's responsible for
425 * setting up everything in the td->files[] area.
427 if (td->io_ops->setup)
428 return td->io_ops->setup(td);
430 if (create_files(td))
433 err = open_files(td);
438 * Recalculate the total file size now that files are set up.
440 td->total_file_size = 0;
441 for_each_file(td, f, i)
442 td->total_file_size += f->file_size;
444 td->io_size = td->total_file_size;
445 if (td->io_size == 0) {
446 log_err("%s: no io blocks\n", td->name);
447 td_verror(td, EINVAL, "total_file_size");
452 td->zone_size = td->io_size;
454 td->total_io_size = td->io_size * td->loops;
456 for_each_file(td, f, i)
457 td_io_close_file(td, f);
462 void close_files(struct thread_data *td)
467 for_each_file(td, f, i) {
468 if (!f->file_name && (f->flags & FIO_FILE_UNLINK) &&
469 f->filetype == FIO_TYPE_FILE) {
470 unlink(f->file_name);
475 td_io_close_file(td, f);
486 static void get_file_type(struct fio_file *f)
490 f->filetype = FIO_TYPE_FILE;
492 if (!lstat(f->file_name, &sb)) {
493 f->flags |= FIO_FILE_EXISTS;
495 if (S_ISBLK(sb.st_mode))
496 f->filetype = FIO_TYPE_BD;
497 else if (S_ISCHR(sb.st_mode))
498 f->filetype = FIO_TYPE_CHAR;
501 * might as well do this here, and save a stat later on
503 f->real_file_size = sb.st_size;
504 f->file_size = f->real_file_size;
509 void add_file(struct thread_data *td, const char *fname)
511 int cur_files = td->files_index;
514 td->files = realloc(td->files, (cur_files + 1) * sizeof(*f));
516 f = &td->files[cur_files];
517 memset(f, 0, sizeof(*f));
519 f->file_name = strdup(fname);
524 if (f->filetype == FIO_TYPE_FILE)
525 td->nr_normal_files++;
528 void get_file(struct fio_file *f)
533 void put_file(struct thread_data *td, struct fio_file *f)
535 if (!(f->flags & FIO_FILE_OPEN))
538 assert(f->references);
542 if (should_fsync(td) && td->fsync_on_close)
545 if (td->io_ops->close_file)
546 td->io_ops->close_file(td, f);
548 f->flags &= ~FIO_FILE_OPEN;
551 static int recurse_dir(struct thread_data *td, const char *dirname)
557 D = opendir(dirname);
559 td_verror(td, errno, "opendir");
563 while ((dir = readdir(D)) != NULL) {
564 char full_path[PATH_MAX];
567 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
570 sprintf(full_path, "%s/%s", dirname, dir->d_name);
572 if (lstat(full_path, &sb) == -1) {
573 if (errno != ENOENT) {
574 td_verror(td, errno, "stat");
579 if (S_ISREG(sb.st_mode)) {
580 add_file(td, full_path);
585 if ((ret = recurse_dir(td, full_path)) != 0)
593 int add_dir_files(struct thread_data *td, const char *path)
595 return recurse_dir(td, path);